摘要
利用热重分析仪研究Co3O4/CoO反应体系在不同气氛下的氧化还原动力学特性,采用Ozawa法及Kissinger法计算得到氧化还原反应的活化能,并建立相应的反应动力学模型。实验结果表明,Co3O4/CoO体系的还原反应符合一级反应模型,氧化反应符合二级反应模型;压力影响函数的引入有利于更精确地描述Co3O4/CoO氧化还原反应动力学的特征和变化;当反应气体氛围中的氧浓度改变时,氧化还原反应的最概然反应机理模型随之改变。
The redox kinetics of Co3O4/CoO reaction system was studied by thermogravimetric analysis under different atmospheres.The activation energy of redox reaction was calculated by Ozawa method and Kissinger method,and the corresponding reaction kinetics models were established.The results show that the reduction reaction of Co3O4/CoO system conforms to the first-order reaction model,and the oxidation reaction is in accordance with the second-order reaction model.The introduction of the pressure influence function is helpful to describe the characteristics and changes of the kinetics of Co3O4/CoO redox reaction more accurately.The most suitable reaction mechanism model of the redox reaction changes with the oxygen concentration in the reaction gas atmosphere.
作者
杨光伟
杨天锋
肖刚
倪明江
岑可法
Yang Guangwei;Yang Tianfeng;Xiao Gang;Ni Mingjiang;Cen Kefa(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第1期302-310,共9页
Acta Energiae Solaris Sinica
基金
国家重点研发计划(2016YFE0124700)。
关键词
热化学储能
金属氧化物
热重分析
氧化还原动力学
机理函数
thermochemical storage
metal oxides
thermogravimetric analysis
redox kinetics
mechanism function
